- 专利标题: LED LIGHTING APPARATUS AND LED DRIVING CIRCUIT THEREOF
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申请号: US16879721申请日: 2020-05-20
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公开(公告)号: US20200375001A1公开(公告)日: 2020-11-26
- 发明人: Hye Man JUNG , Keith HOPWOOD
- 申请人: Seoul Semiconductor Co., Ltd.
- 优先权: KR10-2019-0059525 20190521; KR10-2019-0109017 20190903
- 主分类号: H05B45/375
- IPC分类号: H05B45/375 ; H03K5/24 ; H05B45/44 ; H05B45/20
摘要:
An LED lighting apparatus including a rectifier to rectify AC voltages having different magnitudes and generate driving voltages corresponding to rectified voltages, a buck converter connected to an output terminal of the rectifier and generate an LED driving current corresponding to the driving voltages, a variable reference voltage comparator to receive the driving voltages, and generate variable reference voltages that fluctuate in correspondence to magnitudes of the output driving voltages, compare the driving voltages and the variable reference voltages, and output signals for controlling an operation of the buck converter, an LED including at least one LED group and driven by the LED driving current generated by the buck converter, and a controller including a converter controller to control the operation of the buck converter and a constant current controller to constant current-control the LED driving current applied to the at least one LED group.
公开/授权文献
- US11064587B2 LED lighting apparatus and LED driving circuit thereof 公开/授权日:2021-07-13
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